"I think it would be great to be born on Earth and to die on Mars. Just hopefully not at the point of impact." -Elon Musk"We're a little bit like the dog who caught the bus" - Musk after CRS-8 S1 successfully landed on ASDS OCISLY

"I think it would be great to be born on Earth and to die on Mars. Just hopefully not at the point of impact." -Elon Musk"We're a little bit like the dog who caught the bus" - Musk after CRS-8 S1 successfully landed on ASDS OCISLY

"I think it would be great to be born on Earth and to die on Mars. Just hopefully not at the point of impact." -Elon Musk"We're a little bit like the dog who caught the bus" - Musk after CRS-8 S1 successfully landed on ASDS OCISLY

"I think it would be great to be born on Earth and to die on Mars. Just hopefully not at the point of impact." -Elon Musk"We're a little bit like the dog who caught the bus" - Musk after CRS-8 S1 successfully landed on ASDS OCISLY

I see as much likelihood of the F9 US "evolving" into ITS as I see a tortoise evolving into a sperm whale. But please continue to explain what you have in mind. If it's so simple it should be simple to explain.

I think your analogy is confused, because if you already had a tortoise then you'd probably want to evolve it into Gamera to get it space rated. The F9 US is much more shaped like the sperm whale, and the tortoise already has landing legs. So... If you were instead trying to evolve a sperm whale into a tortoise, then clearly you would look to transition through a sea turtle.